He is in the final year of his contract but has no thoughts that next summer will spell the end of his adventure at United.
He told The Sun: "However long the manager wants me here, and my body can take it, I want to stay at this club.
"From the day I signed I always said that when I leave United I want to be able to walk out with my head held high and my chest puffed out knowing I did a good job.
"But I can't say that yet because the job isn't finished. It is still a work in progress.
"The over-30s at United know how it works, that the club will come to you and offer another deal if they still think you are up to it.
"We've seen that with Paul Scholes this year and he hasn't done too badly has he? So I'm not in a panic, I'm just getting on with it and giving United everything I have.
"I'm proud of playing 400 times for this great club although part of me thinks it could have been 500 if I hadn't had those injuries over the last couple of seasons.
"That's another good reason for keeping going to make up for lost time. I feel good now. I'm over the injuries and enjoying my football as much as ever."